Dzhokhar Tsarnaev, 19, is searched by law enforcement officers in this handout photo provided by the Massachusetts State Police in Watertown, Mass. Tsarnaev had been hiding in the stern of a boat parked in the backyard of a house in Watertown, police said. A resident called police after spotting blood on the boat.

Dzhokhar Tsarnaev, 19, is searched by law enforcement officers in this handout photo provided by the Massachusetts State Police in Watertown, Mass. Tsarnaev had been hiding in the stern of a boat parked in the backyard of a house in Watertown, police said. A resident called police after spotting blood on the boat. (Massachusetts State Police)